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2011 SNA Research Conference Proceedings PROCEEDINGS OF RESEARCH CONFERENCE Fifty-Sixth Annual Report 2011 Compiled and Edited By: Dr. Nick Gawel Tennessee State University School of Agriculture and Consumer Sciences Nursery Research Center 472 Cadillac Lane McMinnville, TN 37110 SNA Research Conference Vol. 56 2011 56th Annual Southern Nursery Association Research Conference Proceedings 2011 Southern Nursery Association, Inc. 894 Liberty Farm Road, Oak Grove, VA 22443 Phone/Fax: (804) 224-9352 [email protected] www.sna.org Proceedings of the SNA Research Conference are published annually by the Southern Nursery Association. It is the fine men and women in horticultural research that we, the Southern Nursery Association, pledge our continued support and gratitude for their tireless efforts in the pursuit of the advancement of our industry. Additional Publication Additional Copies: 2011 CD-Rom Additional Copies: SNA Members $15.00* Horticultural Libraries $15.00* Contributing Authors $15.00* Non-Members $20.00* *includes shipping and handling © Published August, 2011 ii SNA Research Conference Vol. 56 2011 Southern Nursery Association, Inc. BOARD OF DIRECTORS President Phone: (770) 953-3311 Randall Bracy Fax: (770) 953-4411 Bracy's Nursery, LLC 64624 Dummyline Rd. Director Chapter 4 Amite, LA 70422 Jeff Howell Voice: (985) 748-4716 Rocky Creek Nursery Fax: (985) 748-9955 229 Crenshaw Rd. [email protected] Lucedale, MS 39452 (601) 947 - 3635 Vice President/Treasurer [email protected] Director Chapter 3 Bill Boyd Immediate Past President Flower City Nurseries George Hackney P.O. Box 75 Hackney Nursery Company Smartt, TN 37378 3690 Juniper Creek Road Voice: (931) 668-4351 Quincey, FL 32330 [email protected] Voice: (850) 442-6115 Fax: (850) 442-3492 Director Chapter 1 [email protected] Eelco Tinga, Jr. Tinga Nursery, Inc. Executive Vice President (Interim) 2918 Castle Hayne Rd. Karen Summers Castle Hayne, NC 28429 Southern Nursery Association Voice: (910) 762-1975 894 Liberty Farm Road Fax: (910) 763-4231 Oak Grove, VA 22443 [email protected] Phone: 804.224.9352 Director Chapter 2 Mobile: 804.214.5303 Richard May [email protected] Southern Nursery Association 2498 Jett Ferry Road, Suite 201 Atlanta, GA 30338 RESEARCH CONFERENCE Director of Horticultural Co-Chairman Research & Chairman Dr. Nick Gawel Dr. Donna Fare Tennessee State University USDA/ARS/FNPRU Nursery Research Center TSU Nursery Research Center 472 Cadillac Lane 472 Cadillac Lane McMinnville, TN 37110 McMinnville, TN 37110 [email protected] [email protected] iii SNA Research Conference Vol. 56 2011 Acknowledgments The Editor and Board of Directors of the Southern Nursery Association wish to express their sincere appreciation to Derald Harp, Cheryl Boyer, Scott W. Ludwig, Jean Woodward, Marco Palma, Gary Bachman, Gene Blythe, Yan Chen, Amy Wright, Guihong Bi, Donna Fare, Matthew Chappell and Mengmeng Gu for the fine job they did as Section Editors and Moderators. Thanks go to Gary Bachman for his efforts in selecting and instructing judges and Moderating the Bryson L. James Student Research Competition. Our very special thanks goes to Holly Hodges who spent many hours helping the Editor organize the program, and most importantly, preparing the manuscripts for publication. Without the efforts of all these people, the conference would not happen and this year’s Proceedings would not be published. Special thanks are extended to the sponsors of the 2011 SNA Research Conference, Bennett’s Creek Nursery, Lancaster Farms, and the Horticultural Research Institute. Without the financial contributions of these sponsors, the conference could not be held. We would also like to thank the Gulf States Horticultural Expo for providing the venue and additional support for the 2011 SNA Research Conference. We extend our gratitude to all the researchers and nurserymen who attended the 56th Annual SNA Research Conference and/or contributed to these Proceedings. You make this annual event a success. Notice Mention of a trademark name on a proprietary product does not constitute a guarantee and/or warranty of the product by the researcher(s) or their respective universities or the Southern Nursery Association and does not imply its approval to the exclusion of other products that may also be suitable. Permission to reprint articles and quotations of portions of this publication is hereby granted on condition that full credit be given to both the author(s) and the publication, Proceedings of the SNA Research Conference, along with the date of the publication. The Southern Nursery Association is not responsible for the statements and opinions printed in the Proceedings of the SNA Research Conference; they represent the views of the author(s). iv SNA Research Conference Vol. 56 2011 Using Research Data Safely and Effectively Good research is conducted under an exact set of controlled conditions, varying only the specific treatments which are to be evaluated. Results from the specific treatments are directly applicable to your operations only if all the conditions in your operation are controlled the same as in the research. Unfortunately, this seldom happens. However, this does not mean that you cannot benefit from the research. What it does mean is that you should use the research information on a trial basis if your plant species, soil type, watering method, size and age of plant, climatic region, etc. is different than that described by the researcher. What an alert grower should expect to gain from these research reports is ideas – ideas as to the best control for insects, disease, nematodes and weeds – labor saving ideas such as chemical pruning and using growth regulators to minimize maintenance. Also, ideas on water management, nutrition, alternative growing media, new plants for landscaping and guides for improving profits and marketing skills can also be found. Should you desire additional information on any report, please contact the author. v SNA Research Conference Vol. 56 2011 THE PORTER HENEGAR MEMORIAL AWARD for HORTICULTURAL RESEARCH The Southern Nursery Association (SNA) has honored Dr. Winston C. Dunwell, Extension Profesor of Horticulture at the University of Kentucky with the Porter Henegar Memorial Award during the 56th Annual SNA Research Conference. Dr. Gary Knox, a past winner of the award, made the presentation during the SNA Research Conference. Originally known as the Research Award of Merit, the recognition was created in 1968 to honor those individuals who have made outstanding contributions to ornamental horticulture research and specifically to members of the association. In 1972, the award was renamed the Porter Henegar Memorial Award in honor of one of SNA’s former Executive Secretaries. Nominations are made each year by the SNA’s Director of Research and past award winners. Dr. Winston Dunwell was born on Long Island in Southampton, NY . He grew up in East Quogue, NY where farming consisted of horticultural crops. He attended the State University of New York at Farmingdale and received his Associates Degree in Nursery Management. Following 4 years in the US Air Force he attended the University of Wyoming and received his Bachelors of Science in Plant Science/Horticulture. He earned his Ph.D. at the University of Idaho where he worked on the effects of cold stress on Ornamental Plants. In 1979 Win accepted a position with The University of Kentucky as an Extension Horticulture Specialist for Nursery Crops. His area of interest is developing educational programs related to sustainable ornamental plant introduction, propagation, production, and utilization. Dr. Dunwell established the Nursery Crops Development Center to carry out trials on cultivated and native plants with unique characteristics of special interest to the nursery/landscape industry and the gardening public. The goal of the Center is to provide plants that will increase the product mix at the nursery, increase the number of plants available for the landscape designer's pallette, and be useful in environment conservation and restoration. vi SNA Research Conference Vol. 56 2011 The Bryson L. James Student Research Competition 2011 Awards This long-standing program was renamed in August 1989, in honor of Dr. Bryson L. James, longtime Director of Horticultural Research for the Southern Nursery Association. As Dr. James has been an active participant and leader in the annual Research Conference for more than 50 years, the award, named in his honor, is a tribute to his tireless efforts on behalf of the researchers, the association and the industry. Listed below are guidelines for the Student Competition as well as this year's winners: 1. Any student of a university or a college Competition and to the appropriate "topic" having researchers that participate in the Section Editor no later than the specified Southern Nursery Association Research deadline. Conference, are not more than one (1) academic year removed from graduation 5. The paper must follow the guidelines for and whose research was completed prior format and subject matter as stated in the to graduation are eligible to compete. Call For Titles for the SNA Research Conference. 2. Research is to be that of the presenter and a part of his/her educational studies. 6. Student and advisor should be listed as Contract work, unless a part of a thesis or co-authors. classroom report (credit given), is not acceptable, as it may provide unlimited 7. Oral presentation must be limited to funding and an unfair advantage. seven (7) minutes. An additional three (3) minutes will be allotted for questions. A 3. The number of student papers from a penalty of two (2) points per minute or part single university or college may be limited, thereof for every minute over seven (7) should time restraints dictate. minutes will be assessed. 4. The student must have submitted a title to 8. Judging shall be based on preparation of the SNA Conference Editor by the the paper (50 points) and oral deadline specified in the Call For Titles. presentation (100 points) for a total of 150 The paper should then be submitted both points.
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